Boiler



(No Model.) 3 Shee11'1s--Shee1J 1.

C. s. HQPKINS. BOILER.

1111. 519,285. I 1111611111111 May 1, 1894.

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THE NAnoNAL Lm-mennnma COMPANY,

WASHINGTON. n. c. y

(No Model.) 3 Sheets-Sheet 3. (LS. HOPKINS. BOILER.

No. 519,285. Patented May 1, 1894.

NITED STATES ATENT OFFICE.

CHARLES S. HOPKINS, OF ARLINGTON, NEW JERSEY, ASSIGNOR TO THE ELECTRICBOILER COMPANY, OF ROCHESTER, NEW YORK.

BOILER.

SPECIFICATION forming part of Letters Patent No. 519,285,6lated May 1,1894.

.ippiicain filed May 9,1893. serai No. 473,567.

To aZ'Z whom it may concern:

Be it known that I, CHARLEs S. HOPKINS, a

citizen of the United States, residing at Ar-4 to which it appertains tomake and use the` built by arranging a group of vertical rows of pipesat the side of,`or on both sides of a single chamber or header. I havefound by actual experlment, that by reason of the eX- treme welght ofthe boiler 4when so many pipes were connected into one headernecessitated the useof considerable force to moveit, and the jointswould invariably be strained In my invention each vertical row of pipeshas aseparate stand pipe. Also, the pipes of the'dlfferent rows arearranged in pairs locatedon opposite sides of the headers, the top pipeo f a pair on one side of aheaderbe ing opposite or in line with thebottom pipe of a pair on the other side, and the top pipe of the lastnamed pair being opposite or in line with the bottom pipe of anotherpair on the other side, andso on. In this way I find that forty percent. better results for hot water are gotten than with the old plan.This is owing to the fact that in the.. old plan the force of thecurrents exhaust themselves in a large part by striking against eachother, whereas in mine there is a continuous circulation, and the steamand hottest water are allowed to ascend to the top with the slightestpossible friction.

To accomplish these objects my invention consists in certain details ofconstruction and combinations of parts tobe hereinafter described andthen particularly pointed out in the claims.

(No model.)

In the accompanying drawings: Figure 1 is a verticalsection through myimproved boiler, and yits casing. Fig. 2 is a vertical section on lineII-II, Fig. 1,looking toward the rear of the boiler. Fig. 3 is avertical section on line III-III, Fig. 1, looking toward the irontof theboiler. Fig. 4 is a vertical section on line IV--IV, Fig. 1. Figs. 5, 6and 7 are transverse sections on lines V-V, VI-VL and VII-VII, Figs. 1,and 4. i Fig. 8 is a detail View of the smoke-pipe.

`Referring now to said drawings, 1, indicates the casing of suitablematerial oi' my improved water-tube boiler, 2, the lire-box, 3, thegrate, and 4 the ash-pit. The iire-box and ash-pit are provided withsuitable doors, such as 5,

6 respectively. A partition wall 7 is located at the rearV of theash-pit 4, and supports the central portions of the boiler. Verticalconduits or castings 8 are supported on the partition wall 7, and are ofthe shape in crosssection as shown in Figs 6 and 7, they being arrangedclosely together side by side, in such way as to form with the partition7 a dividing wall between the front and rear portions of the boilercasing. .These conduits or castings I designate stand pipes and whilethey constitute with the partition 7 a dividing wall forming a frontcombustion chamber 9, and a rear combustion chamber 10, they end shortof the top of the casing so as to leave a space 11, through which theproducts of combustion pass from the chamber 9 into the chamber 10. Eachstand 8 pipe isprovided with internally screw-threaded bosses 12, havingHaring counterbored extensions 12a, and arranged in zigzag form, seeFigs. 4 to 7. Radiating from the stand pipes 8 are circulating pipes13,13, 14, 11, which are screwed into the bosses 12. These pipesare 15,and the zigzag arrangement of the bosses producesa staggeredarrangementof thepipes,

see Figs. 2 and 3.

Connected with the lower end of each stand pipe is an inlet pipe 16,which leads from the supply header 17 located outside the casing. Aboveeach stand pipe is an eduction Vpipe 18, extending from front to rear ofthe casing and connected at its frontend with a circulating pipe 14.".The rear ends of the eduction pipes 18 and of the circulating pipes 13b,

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are connected by suitable couplings with the short pipes 18, which leadto the Iiow header 19,1ocated outside the top of the casing 1. Each pipe18 and stand pipe 8, are connected by short pipes 20, between which theproducts of combustion pass down into the chamber 10 and out through thesmoke-pipe 21, located below the boiler. This smoke pipe 21 is providedwith a cylindrical head 212, at its inner end, which has a longitudinalmouth or slot 2lb, adapted to be opened and closed by a swinging damper21C, the curve of which is concentric with that of the head. The pivot21d, of the damper constitutes the axis of the head 21a. The two seriesof paired circulating pipes 13, 13*L and 14, 14, of each stand pipe 8,are so arranged that there are some of the pipes 13, 132, behind thefire-box, they being more numerous than pipes 14, 14". The stand pipes 8provide a Water-back to the irebox, (which latter is formed by leavingthe lower front portions of the stand pipes plain,) and commencing thepipes 14, 14a, some distance upon the stand pipes, so that said pipeswill be located entirely above the rebox. The pipes 13, 132, 14, 145',are also so arranged that the upper pipe 13 ot each pair of pipes of therear series excepting the lower pair, is located opposite and in linewith the lower pipe 14, of each pair ot' pipes ofthe front series, andthe upper pipe 14 of each pair of pipes of the front series is locatedopposite and in line with the upper pipe 132,01? the rear series,excepting the two lowerinost pipes 13, 13a. This arrangement is,therefore, such as that the stated upper pipes of the rear seriesdischarge into the stand pipes 8 opposite the lower pipes of the frontseries, and vice Versa, so as to secure a continuous circulation. Thecirculation throughout the boiler is as indicated by the arrows. Eachcentral stand pipe 8, with its complement ot pipes, forms one completesection. Any number of sections may be placed side by side and connectedwith the supply. or header 17, and low header 19.

By varying the number of sections and the lengths of the pipes screwedinto the stand pipes, a great many sizes of boilers may be obtained,with only one size for each stand pipe. The flared counterboredextension 12,

of the bosses 12 readily admit the ends of the.

pipes 13, 13, 14,14, so that they may be screwed into the bosses withease and rapidity. The ame and products of combustion pass between thepipes and keep the water very hot, and to properly distribute the heatbafiie plates 22, 23, 24 are let into the casing of the boiler, thuscausing the products of combustion to take a course near the front andback at the top, and farther inward at the bottom of the rear chamberIO.

I/Vhen the boiler is used for steamheating I run drip pipes 25 from theshort pipes 18a, to the inlet pipes 16.

Having thus described myvinvention, what I claim as new therein, anddesire to secure by Letters Patent, is-

1. The combination with the lire-box, ofthe series of stand-pipesconjunctively forming a water-back for the fire-box, a front series ofcirculating pipes connected with the said series of stand-pipes andlocated above the firebox, a rear series of circulating pipes alsoconnected with said series of stand-pipes, lower supply pipes connectedto said stand-pipes and upper eduction pipes extending f roin front torear of the casing and communicating with each stand pipe, and asmoke-pipe whereby the products of combustion are permitted to pass upthrough the spaces between the front circulating pipes over the seriesof stand-pipes, down through the space between the rear circulatingpipes, and out through the smoke pipe, substantially as set forth.

2. The combination of the series of standpipes conj unctively forming awater-back for the {ire-box, circulating pipes, some of which arelocated above the tire box and others at the rear, each stand pipe andits circulating pipes forming a section, eduction pipes located abovethe stand-pipes, spaced pipes connecting the eduction pipes and seriesof stand pipes, and arranged .to permit the passage of the products ofcombustion between thenrand over the series of stand pipes,substantially as set forth.

3. In a water-tube boiler, a group of sections, each section beingseparate and distinct from the other, and stand-pipes provided withcirculating-pipes, said stand-pipes. being arranged closely together andconJ un ctively forming a water-back for the Firebox, and saidcirculating pipes being staggered and arranged in pairs so that the toppipes of the pairs on one side of each stand pipe will .be opposite thebottom pipes of the pairs on the opposite side thereof,y substantiallyas set forth.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES S. HGPKINS. Witnesses:

E. SoBKwiAK, J oHN KING.

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